Hi Piotr,
I have no idea, why the documentation discusses the specific subject.
A NAT configuration works bi-directional:
- traffic to the NAT (incoming) will be forwarded to the "Origin" by applying destination address translation
- traffic from the "Origin" (outgoing) will be forwarded to target and source address translation is applied
Where is the use case to combine a SNAT with a NAT?
Whenever possible I avoid to create so called Default SNATs (aka SNAT List entries). Instead I´m using virtual servers to forward traffic and apply SNAT as SNAT AutoMap / SNATpool as property of the virtual server or via iRule.
Thanks, Stephan